NGWS SDK Documentation  

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Compiler Warning (level 3) C4101

'identifier' : unreferenced local variable

The local variable is never used. This warning will occur in the obvious situation:

void main() {
int i;   // C4101
}

However, this warning will also occur when calling a static member function through an instance of the class:

struct S {
   static int func()
   {
      return 1;
   }
};

int main() {
   S si;   // C4101, si is never used
   int y = si.func();
   return y;
}

In this situation, the compiler uses information about si to access the static function, but the instance of the class is not needed to call the static function; hence the warning. To resolve this warning, you could: